Warp stop-motion for looms



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v 0. SMITH. WARP STOP MOTION FOR LOOMS.

No. 515,555. 7 Patented Pb. 27, 15.94,

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{No Model.) w 3 ShBBtSf-Shfifit 0. SMITH. WARP STOP MOTIUN FDR LOOMS.

No. 515,636. Patented Feb. 27, 1894.

{No Model.) 3 Sheets-Sheet 3.

0. SMITH. WARP STOP MOTION FOR LUOMfi.

Patented Feb. 27, 1894.

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Unrrso Srn'rns PATENT @rrrca.

DEER-LIN SMITH, OF BRIDGETON, NEWV JERSEY, ASSIGNOR OF ONE-HALF TOGEORGE DRAPER 8: SONS, OF I-IOPEDALE, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 515,536, dated February27, 1894.

Application filed June 12, 1893.

To all whom it may concern.-

Be it known. that I, OBERLIN SMITH, of Bridgeton, county of Cumlierland,State of New Jersey, have invented an Improvement in Warp Step-Motionsfor Looms, of which the following description, in connection with theaccompanying drawings, is a specificalion, like letters on the drawingsrepresentin g like parts.

This invention relates to warp stop motions for looms, in which thebreakage or slackening of a warp thread is detected by the difference intension upon the heddle through which it passes.

The object of this invention is to provide simple and. reliablemechanism by which the loom may be stopped when the tension of anyparticular warp thread or threads upon its heddle or heddies is not asgreat as it should be.

In carrying out this invention 1 provide a series of heddle heads,which, when thread heddles are used, are formed independently of theheddles and movedthereby, but which when wire heddles are used areformed preferably by the ends of the heddles themselves, which heads aremoved at each formation of a shed by the tension of the warp threadswhen moved by said heddles into one or the 0 other plane of that shed.Each heddle frame is provided with a feeler which is moved toward andfrom the heddle heads of that frame, the range of movement of suchfeelers being varied by the positions of the heddleheads. (lo-operatingwith the several independent feelers on the respective heddle frames,and constituting one of the principal features of this invention, is asingle masterfeeler which stands at the end of the loom and co-operateswith the feelers on the beddle-frames, which thereby control themovements of the master feeler at the end of the loom, the lattercontrolling the stop-motion. In the preferred construction I have alsopro- 5 vided a suitable connection moved or controlled by this masterfeeler at the proper time, and interposed between a lug on the weft orother slidebar which actuates the stop-motion, and a moving part of theloom, whereby the said moving part through said Serial No. 477,342. (Nomodel.)

connection moves the lug and stops the loom without throwing anystresses or work of any sort upon the more delicate parts of thestopmotion.

Other features of this invention will be hereinafter more fully setforth in the specification and claims.

Figure 1 of the drawings represents in vertical cross section, a loomequipped with a stop-motion embodying this invention; Fig. 2, a sectionon an enlarged scale of the essential working parts of Fig. 1; Fig. 3, apartial face view looking from the left of the parts shown in Fig. 2;Figs. 4 and 5 similar views to Figs. 2 and 3, but showing the parts indifierent position, or in the positions they will assume when stoppingthe loom; Figs. 6,

7 and 8, enlarged sectional details of parts of a heddle frame showingthe co-operative movement of one of the auxiliary feelers with theheddle-heads; Fig. 9, a detail showing the manner of actuating anauxiliary feeler; Fig. 10, a sectional detail illustratinga modifiedconstruction to be described; Fig. 11, a cross sectional detail of theswinginglever o, 5 showing its forked or recessed end to be describedand Fig. 12, a detail showing a modification of heddle head to bedescribed.

Referring to the drawings, A represents a portion of the end frame of aloom; B the Sc lay or crank-shaft; G the lay; O the laysword operatedfrom said shaft; 0 the breastbeam; (3 a weft-fork; C a weft-slide bar; Ca weft-hammer; O a cam on the shaft C to actuate the said weft-hammer; fa rock-shaft having an arm f adapted to be engaged and moved by the weftslide-bar O and an arm f adapted to push the shipper, not shown, fromits notch and effect the stopping of the loom, all of which are and maybe of any well no known or desired construction and arrangement,actuated in usual manner, and need not therefore be herein furtherdescribed either as to their construction or operation.

D, D, represent the heddle frames or car-* 5 ricrs for the heddlesthrough which the warp threads are passed, which heddles, so far as thisinvention is concerned, may be of either thread or wire, or in fact ofany other suitable or desired form.

I have, however, in the 00 principal figures of the drawings, elected toillustrate my invention as used in connection with the usual threadheddles.

Referring to Figs. 2 and 3, the heddle frames D, D, consist of upper andlower frame bars d, 61', together with an intermediate bar 61* locatedparallel with and near to the upper frame bar cl. The thread heddles ithaving eyes h, through which the warp threads 10 are passed, are, attheir lower ends, passed about or otherwise secured to the lower framebars d of the heddle frames, and at their upper ends said heddles areattached or hooked to the lower ends of the pins 6, see Figs. 2, 6 and8, fitted to slide vertically in the intermediate bars cl" of the heddleframes, the said pins at their upper ends being provided with heads 6which constitute one form of heddle-heads connected with the heddles andmoved by the varying tension of the warp threads thereupon.

Referring to Fig.8, the springs a surrounding the pins e, and acting attheir upper ends against the heads e thereof, act to move the headsnormally into their elevated positions thereby maintaining the 'heddlestaut.

Each heddle frame is provided, as shown best in Figs. 6 to 8, with afeeler'm, hereinafter termed an auxiliary feeler, to distinguish it froma master feeler to be described, said auxiliary feeler being pivoted atits ends in the Vertical end bars of the frame, and is adapted to bemoved about itsaxis,and caused to sweep across the paths of movement ofthe heddle heads of that frame, clearing the said heads when the latterare drawn down into their lowermost positions, as in Fig. 6, butencountering and being stopped by any one of said heads permitted toremain in its elevated position, as shown in Figs.7 and 8. Eachauxiliary feeler m has secured toits pivotat one end of and outside itsframe, an arm m, see Fig. 9. which preferably extends in a directionsubstantially at right angles to the feeler, said arm in the presentconstruction in turn having a finger m leading from it at right anglesor in a direction substantially parallel with the feeler m, said arm mat its outer end having an eye through which is passed the end of afeeler actuating rod m extended downwardly, as shown in Fig. 5, and atits lower end secured to some fixed support, as, for instance, the frameof the loom, a spring m being interposed in and preferably forming apart of this actuating rod m From this it will be seen that whenever aheddleframe is raised, carrying with it the feelerm, the actuator mattached to a fixed support at its lower end will act to pull the arm mdown,and thereby turn the feeler on its pivot and cause it to sweepacross the paths of movement of the heddle-headsin that frame, thespring m interposed in the actuator permitting-the heddle frame to be atall times raised whether or not the feeler is permitted to partake ofits full movement. A spring m also attached to the outer end of the armm, and at its upper end to the heddle frame, serves to return the feelerto its normal posithan upon the descent of the heddleframe.

By reference to Figs. 6, 7, and 8, it will be seen that the finger mstands in a vertical position only, when the feeler is in its position,Fig. 6, it having been moved through the entire range of its movement,and that whenever the feeler is stopped by either of the heddle-heads itleaves the said finger in an angular position, as shown in either Fig. 7or Fig. 8.

Referring particularly to Figs. 1 to 5, N represents what 1 term amaster-feeler, the same being arranged in a position substantially atright angles to the auxiliary feelers m, and journaled at its ends insuitable bearings 72 carried by one of the end frames of the loom, saidmaster feel'er, opposite the ends of the heddle frames, having thedepending plate portion n in which are out several vertical slots 01there being a slot for each heddle frame, said slots being located insuch positions with relation to the said heddle frames and the fingers mmounted thereon, that when the said fingers stand in substantiallyvertical positions, as in Fig. 6, the said masterfeeler may be swung onits pivots toward the ends of the heddle frames, the fingers passingthrough the vertical slots m in the said master feeler, but when thesaid fingers are in their positions Figs. 7 and 8, they cannot entersaid slots and will therefore interrupt and stop the movement of themaster-feelen The master feeler is moved by oppositely extended arms n71 see Figs. 3 and 5, to which are connected the actuating rods n aleading downwardly and connected with the ends of the oppositelyextended arms 71", a see Fig. 1, on the lower pivoted end of the laysword, so that when the latter is rocked to carry the lay forward andback the movements of the arms n 91 will act through the rods n n", tocommunicate a rocking movement to the master feeler, causing the latterto move toward and from the heddle frames at each pick. The actuatingrods, as herein shown, have interposed between their ends, springs at, nwhich yield when the master feeler encounters and is stopped by one ofthe fingers m or otherwise. To the forward end of the master feeler N ispivoted at 0 the swing-bar 0', counter-weighted at 0 and maintainedthereby in a normal inclined position, Fig. 2, against the pin 0 on thefeeler. This swing-bar is rocked back and forth with the master feelerfrom its full to its dotted line position Fig. 3 at each pick.

Referring particularly to Fig. 2, 0 is a lug standing vertically fromthe weft slide 0 and o is an arm projecting forward from the end railupon the lay and movable therewith, said arm having, as shown, anupturned end 0 In the normal operation of the mechanism the full,unobstructed movement of the master feeler carries the swing lever 0always into one or the other of its extreme positions,

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Fig. 3, clearing in its movement the arm which latter is not of.sufficient length to reach the lug 0 when the lay reaches the end of itsforward movement. hen, however, the master feeler is obstructed in itsmovement, and is stopped after having begun such movement, it leaves theswing-lever midway between its two extreme positions, or in asubstantially vertical position, Fig. 5, where it is retainedfrictionally by the spring n said lever in its intermediate verticalposition being interposed between the upturned end 0 i of the arm 0 onthe lay and the lug 0 on the weft slide, so that when the lay approachesthe end of its forward or beating-in movement the said arm 0 willencounter the lower end of the swing-lever o and through said lever willpush the lug o and the weft slide 0 forward to efiect thestopping of theloom. The rods n n, are, as before stated, connected at their lower endswith the arms n 72- on the lay swords by chains or other flexihis orsuitable connections which provide a lost movement, whereby the masterfeeler is moved only at the last end of each forward and back movementof the lay.

The operation of my improved stop-motion may be briefly described asfollows, vizz-So long as the wrap-threads remain unbroken and taut theywill, when moved into the upper plane of the shed, exert apull ortensionupon the heddles which raise them, and will thereby A draw said heddlesand'the pins or heads 6 connected thereto down into their lowermostpositions, as in Figs. 2, 3, and 6, so that the auxiliary feeler m ofthe heddle frame, which is raised, may have an unobstructed and freemovement across the paths of movement of the said heads to thereby beturned to bring the finger m on its arm m into a substantially verticalposition, Figs. 6 and 9. This is done just before the lay reaches theend of its backward movement, at which time the master feeler N, rockedby the actuating rods 01?, n is moved on itspivots inwardly or towardthe ends of the said heddle frames and the fingers thereon. The fingerson the raised heddle-frames standing in substantially vertical positionby reason of the full movement of the auxiliary feeler described, permitsaid master feeler to have a full movement passing the fingers m thelatter passing through the slots n in the master feeler, such movementof the master feeler carrying the swing lever 0' to the right, as inFig. 3, into its dot-- ted position beyond or out of the line ofmovement of the arm 0 on the lay, so that as the latter approaches andreaches the end of its forward movement the upturned end of said armwill fall short of the log 0 on the weft slide and will fail to move thesame, thereby permitting continued operation of the loom. If one of thewarp-threads becomes broken or unduly slack it will fail to exert theproper tension upon the heddle which moves it and will permit saidheddle to be retained taut by the action of the spring e against theheddle-head keeping the said head in its raised normal position, as inFigs. 7 and 8. With the heddle-head in this position the movement of theauxiliary feeler on that bed die-frame is obstructed and stopped,leaving the finger m on its arm on in such an inclined position, asshown in Fig. 7 or Fig. 8, that it will not pass through its slot in themaster feeler when the latter is moved toward it, the said finger whenin such position stopping the master feeler midway the movement of thelatter, after it has moved the swing-lever 0' into a substantiallyvertical position, as in Fig. 5, directly in the line of movement of thearm 0 on the lay. In its next succeeding forward or beating-in movementof the lay the end 0 of the arm 0 will strike theswing lever 01,interposed between it and the lug 0*, and will push the said leverbefore it against and thereby moving the lug and the weft slide toeffect the stopping of the loom, the said swing-lever turning on itspivot 0 to permit such movement, it being immediately returned to itsposition Fig. 2 upon the return movement of the master feeler. The lowerend of the swing-lever 0', see Fig. 11, is formed at its front sideadjacent the log 0 to present a concavity or recess, which when thelower end of the said -lever is in contact with the said lug preventsthe said lever being moved laterally away from the lug. This isnecessary for the following reason, viz:The master-feeler is, owing tothe lost motion or slack in the rods a n, moved only at the latter partsor ends of the forward or back movements of the lay. With this in mind,if the swinging lever has been stopped in its intermediate position byreason of a broken or slack warp-thread, as described, the arm 0 willstrike it as the lay approaches the end of its forward movement and willtend to push the same against and to move the log 0 to stop the loom,but as the master feeler is normally moved at or near the end of theinward movement of the lay, the tendency of the rod n would be to pullthe swinging lever out from between the arm 0 and the lug 0 before theslidebar had been pushed sufficiently forward to stop the loom. This isprevented, as willbe seen, by the recess 0 in the front side of theswinging lever, which prevents the latter being withdrawn from betweenthe lug and the arm 0 so long as the said lever is maintained in contactwith or against the lug. In thenormal operation of the loom the swinginglever o swings over and clears the arm 0 behind the upturned end 0. Foreonvenience in manufacture the heddle-heads e are staggered in the bar din order to make them as large as possible without requiring an undueamount of room.

The swing lever 0' constitutes a connection, interposed at times betweenthe movable lug 0" which effects the stopping of the loom and the lay, amoving part of the loom.

In Fig. 10 I have shown one adaptationof y the heddles themselves, asshown in Fig. 12.

7 As manyheddle-frames as'desired may be employed, for whatever be thenumber, a single masterfeeler is sufficient, it being neces- I sary onlythat said master feeler be provided with as many vertical slots n asthere are I heddle-frames; and it matters not how many of theseheddle-frames be raised at once, for all or a part only may be raisedand operate equally as well. 7 I I The term heddle-heads, asemployed inI the claim s,includesany heads either indethe warp threadspassedthrough the heddles.

This invention is not limited to the particular construction or partsherein shown, for I the construction shown issimply one embodiment ofthis invention and such construction may be varied in many particularswithout departing from the spirit and scope of the invention.

I claim- 1. Awarp-stop motionfor looms containing the followinginstrumentalities, viz;-a hed dleframe, a series of heddlescarriedthereby, and, heads connected with the, said heddles and adaptedto be moved by the varying tension of the warp threads therein, a feelermovable toward and from said heads,a co-operating master feeler, and astopping mechanism controlled thereby, substantiallyas described.

2. A warp-stop motion for looms containing the followinginstrumentalities, viz; -a heddle-frame, aseries of heddles carriedthereby, heads connected with said heddles and adapted to be moved bythe varying tension of the warp threads therein,a feeler movable towardand from said heads, a co-operating master-feeler, a stopping mechanismfor the loom, a movable lug to actuate the same, and a connectionactuated by said master-feeler and adaptedto be at times interposedbetween said lug and a moving part of the loom to actuate the former bythe latter, substantially as described.

3. Awarp-stop motion for looms containing the followinginstrumentalities, viz;a series of heddle-frames, heddles carried byeach, heads moved by said heddles, and auxiliary feelers on and movablewith said frames, a master-feeler co-operating with said auxiliaryfeelers, and a stopping mechanism for the loom controlled by saidmaster-feeler, substantially as described.

4. A warp-stop motion for looms containing the followinginstrumentalit-ies, viz;-a series of heddle-frames, heddles carriedthereby, and heads connected with and moved by said heddles, a feeler oneach of said heddle frames, a finger moved into different positions bysaid feeler, a master-feeler having heads connected with and moved bysaid heddles; an auxiliary feeler on each ofsaid frames; fingers on andmovable by said auxiliary feelers; a master-feeler, having openingstherein to co-operate with said fingers; a stopping mechanism; a movablelug controllingthesame and a movable connection on sa'idmaster-feeler,and adapted to be moved intoposition between said lugand a moving 7 partof the loom whereby said lug is'a'ctupart of'the loom, subated by saidmoving stantially as described.

,6. Awarp-stop motion for looms containing the followinginstrnmentalities, viz;'a lied die-frame; heddles carried thereby; headsconnected with and moved by said heddles; a co-ope'rating pivoted feeleradapted to be swung toward and from said heads; and stopping mechanismfor the loom controlled by scribed.

7. A warp-stop motion for looms containing the followinginstrumentalities, viz;-'a series of heddle-frames; heddles carriedthereby; heads connected with and moved by said heddles; auxiliaryfeelers on said heddle frames respectively; a lay and a master-feeleractuated therefrom and co-operating with said auxiliary feelers; andstopping mechanism for the loom controlled by said master-feeler,substantially as described.

8. A Warp-stop motion for looms containing the followinginstrumentalities, Viz;a series of heddle-frames; heddles carriedthereby; and heads moved by said heddles; a feeler; and an actuatortherefor connected with a fixed support whereby movement of the saidheddle-frame with relation to said support causes movement of saidfeeler, substantially as described.

9. A warp-stop motion for looms containing the followinginstrumentalities, viz ;a series of heddle-frames; heddles carriedthereby;

movements of said feeler, substantially as de heads connected with andmoved by said heddles; a feeler and a yielding actuator connecting thesame with a fixed support whereby said feeler is moved by movement ofsaid heddle-frame with relation to said support, said actuator yieldingwhen movem ent of the feeler is obstructed, substantially as described.

10. A warp-stop motion for looms containing the followinginstrumentalities, viz ;a series of heddle frames; heddles carriedthereby; heads connected with and moved by said heddles; a feeler oneach heddle frame and means to move the same; aco-operatingmaster-feeler on the loom-frame; an actuator for the sameconnected with and moved by the lay; and a spring interposed in saidactuator; substantially as and for the purpose specified.

11. A warp-stop motion for looms containing the followinginstrumentalities, viz';a series of heddle-frames; heddles carriedthereby, and heads connected with and moved by said heddles a feeler oneach of said heddle-frames movable toward and from the heddle heads oftheir respective frames, a co-operating master-feeler, rods connectingthe same with and to be actuated by the lay and to provide a lost motionwhereby the feeler is moved only at or near the ends of the forward orback movement of the lay; stopping mechanism forthe loom; a. movable logto actuate the same; and a connection actuated by said master-feeler andadapted to be at times interposed between said lug and a moving part ofthe loom to actuate the former by the latter,

substantially as described.

12.- A warp stop motion for looms containing thefollowing-instrnmentalities, viz;a series of heddleframes, heddlescarried thereby; heads connected with and moved by said heddles; anauxiliaryfeeler on each of said frames; fingers on and movable by saidauxiliary feelers; a mastenfeeler, openings therein to cooperate withsaid fingers; a stopping mechanism; a movable lug controlling the same;a movable connection on said master feeler adapted to be moved intoposition between said lug and a moving part of the loom whereby said lugis actuated by said moving part of the loom; and a friction device forand to retain the said master-feeler and its connec tion in itsdiiferent positions, substantially as described.

13. A warp stop-motion for looms containing the followinginstrumentalities, viz ;a series of heddle -frames, heddles carriedthereby; heads connected with and moved by said heddles anauxiliaryt'eeleron eachof said frames fingers on and movable by saidauxiliary feelers; a master-feeler, openings therein to cooperate Withsaid fingers; a stopping mechanism; a movable lug controlling the same;and a movable connection 0 on said master-feeler and provided with arecess o at its front side,

a the said connection being adapted to be moved into position betweensaid lug and a moving part of the loom whereby said lug is actuated bysaid moving part of the loom, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OBERLIN SMITH.

Witnesses:

HUGH L. REEVES, RoBT. S. SCHILLER.

